Funding for this research was provided by:
European Regional Development Fund (POCI-01-0145-FEDER-006862)
Fundação para a Ciência e a Tecnologia (UID/DTP/04750/2013, PD / BD / 105826/2014)
Article History
Received: 19 September 2018
Accepted: 6 August 2019
First Online: 3 September 2019
Ethics approval and consent to participate
: Not applicable.
: Not applicable.
: The authors declare that they have no competing interests.